<!DOCTYPE html>
<link rel=match href=block_formatting_context_overflow_ref.html>
<style>
section {
    display: block;
    width: 0;
}
nav {
    display: block;
}
aside {
    display: block;
    overflow: hidden;
}
main {
    width: 500px;
}
</style>
<section><main><nav><aside>Hello</aside>world!</nav></main></section>

